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SN74221 Datasheet(PDF) 6 Page - Texas Instruments

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Part # SN74221
Description  DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74221 Datasheet(HTML) 6 Page - Texas Instruments

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SN54221, SN54LS221, SN74221, SN74LS221
DUAL MONOSTABLE MULTIVIBRATORS
WITH SCHMITT TRIGGER INPUTS
SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS†
SN54221
SN74221
UNIT
PARAMETER
TEST CONDITIONS†
MIN
TYP‡
MAX
MIN
TYP‡
MAX
UNIT
VT+
Positive-going threshold voltage,
B input
VCC = MIN
1.55
2*
1.55
2
V
VT−
Negative-going threshold voltage,
B input
VCC = MIN
0.8*
1.35
0.8
1.35
V
VIK
VCC = MIN,
II = −12 mA
−1.5
−1.5
V
VOH
VCC = MIN,
IOH = −800 µA
2.4
3.4
2.4
3.4
V
VOL
VCC = MIN,
IOL = 16 mA
0.2
0.4
0.2
0.4
V
II
VCC = MAX,
VI = 5.5 V
1
1
mA
IIH
A input
VCC = MAX,
VI = 2.4 V
40
40
A
IIH
CLR, B input
VCC = MAX,
VI = 2.4 V
80
80
µA
IIL
A input
VCC = MAX,
VI = 0.4 V
−1.6
−1.6
mA
IIL
CLR, B input
VCC = MAX,
VI = 0.4 V
−3.2
−3.2
mA
IOS§
VCC = MAX
−20
−55
−18
−55
mA
ICC
Quiescent
VCC = MAX
26
50*
26
50
mA
ICC
Triggered
VCC = MAX
46
80*
46
80
mA
∗ On products compliant to MIL-PRF-38535, this parameter is not production tested.
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
timing requirements over recommended ranges of supply voltage and operating free-air
temperature
SN54221
SN74221
UNIT
MIN
MAX
MIN
MAX
UNIT
tw
Pulse duration
A or B input
50
50
ns
tw
Pulse duration
CLR
20
20
ns
tsu
Setup time, inactive-state¶
CLR
15
15
ns
Rext
External timing resistance
1.4*
30*
1.4
40
k
Cext
External timing capacitance
0*
1000*
0
1000
µF
Output duty cycle
Rext = 2 kΩ
67%
67%
Output duty cycle
Rext = MAX Rext
90%
90%
∗ On products compliant to MIL-PRF-38535, this parameter is not production tested.
¶ Inactive-state setup time also is referred to as recovery time.


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